Superb specimen of Douvilleiceras fossil ammonite from Madagascar, distinctive for its prominent ribs, nodes, and bold spiral form. The intricate suture lines and fine polish highlight rich, amber-toned crystallization ...

Discover the Douvilleiceras, a fossilized ammonite distinguished by its robust ornamentation and strong, knotted ribs. Unlike smoother forms, this specimen exhibits exceptional relief, reflecting the richness of marine life ...